<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Document</title>
  <link rel="stylesheet" href="style.css">
</head>
<body>
  <div class="container">
     <div class="sun"></div>
     <div class="earth">
         <div class="moon"></div>
     </div>
  </div>
</body>
</html>